Hi, Michael! You have asked: Who can certify this set to be intended to stick on bananas? Here is my answer.
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"Artes" is a well-known brand in my country, owned by group of Russian companies - SPC, SoyuzPromContract (please, visit http://spcontract.com/en/), headquartered in the Moscow region. SPC specializes in importing two products only: bananas from Ecuador, which are sold (mainly in Russia) under the brand name "SPC Artes", and apples from Azerbaijan, which are sold under the brand "Gusar".
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Thus, if you see stickers with the brand "SPC Artes", then you can be absolutely sure that these are banana stickers.